These ram sticks came out of a working machine. They are Patriot Viper DDR4 8GB (2 x 4GB) 2666MHz UDIMM Dual Kit is a high-quality memory upgrade for your computer. Featuring a total capacity of 8GB split into two 4GB modules, this DDR4 SDRAM kit is designed for performance and reliability. The grey color and sleek UDIMM form factor add a stylish touch to your computer. Backed by a lifetime manufacturer warranty, you can trust in the long-lasting quality of this Patriot Viper memory kit. Upgrade your system with this top-notch memory solution.